Sustainable cities.html



A sustainable city, ecocity or ecopolis is an entire city dedicated to minimizing the required inputs (of energy, water and food) and its waste output (of heat, air pollution as CO₂, methane, and water pollution.) Richard Register first coined the term "ecocity" in his 1987 book, Ecocity Berkeley: building cities for a healthy future.¹ Another leading figure who envisioned the sustainable city was architect Paul F. Downton, who later founded the company Ecopolis Pty Ltd. The field of industrial ecology is sometimes used in planning these cities.

A sustainable city can feed and power itself with minimal reliance on the surrounding countryside, and creates the smallest possible ecological footprint for its residents.^{citation needed} This results in a city that produces the least possible pollution, attains highly efficient land use, and makes the lowest possible contribution to global warming.^{citation needed} It is estimated that as of 2007, over half of the world’s population now lives in urban areas^{citation needed} and this provides both challenges and opportunities for environmentally-conscious developers.

Practical achievement

These ecological cities are achieved though various means, such as:

• Different agricultural systems such as agricultural plots within the city (suburbs or centre). This reduces the distance food has to travel from field to fork. Practical work out of this may be done by either small scale/private farming plots or through larger scale agriculture (eg farmscrapers).
• Renewable energy sources, such as wind turbines, solar panels, or bio-gas created from sewage. Cities provide economies of scale that make such energy sources viable.
• Various methods to reduce the need for air conditioning (a massive energy demand), such as planting trees and lightening surface colors, natural ventilation systems, an increase in water features, and green spaces equaling at least 20% of the city's surface. These measures counter the "heat island effect" caused by an abundance of tarmac and asphalt, which can make urban areas several degrees warmer than surrounding rural areas—as much as six degrees Celsius during the evening.
• Improved public transport and an increase in pedestrianization to reduce car emissions. This requires a radically different approach to city planning, with integrated business, industrial, and residential zones. Roads may be designed to make driving difficult.
• Optimal building density to make public transport viable but avoid the creation of urban heat islands.
• Solutions to decrease urban sprawl, by seeking new ways of allowing people to live closer to the workspace.^{citation needed} Since the workplace tends to be in the city, downtown, or urban center, they are seeking a way to increase density by changing the antiquated attitudes many suburbanites have towards inner-city areas.^{citation needed} One of the new ways is on how this is achieved is by solutions worked out by the Smart Growth Movement.^{citation needed}
• green roofs
• green transport
• sustainable urban drainage systems or SUDS
• energy conservation systems/devices
• xeriscaping - garden and landscape design for water conservation

International examples

Kenya

Hacienda - Mombasa, Kenya. It is the largest development of eco-friendly residential properties in East Africa; construction is currently ongoing, and it will eventually be one of Africa’s first self-sustaining estates.

Brazil

Curitiba is often cited as an example of urban sustainability.

Sweden

Hammarby Sjöstad, Stockholm

Denmark

The industrial park in Kalundborg is often cited as a model for industrial ecology.

Ecuador

Loja, Ecuador won three international prizes for the sustainability efforts begun by its mayor Dr. Jose Bolivar Castillo.²{{rp|25}

New Zealand

The city of Waitakere, the Western part of the greater Auckland urban region, was New Zealand's first eco-city, working from the Greenprint, a guiding document that the City Council developed in the early 1990s.

Republic of Ireland

South Dublin County Council announced plans in late 2007 to develop Clonburris, a new suburb of Dublin to include up to 15,000 new homes, to be designed to achieve the highest of international standards.³ The plans for Clonburris include countless green innovations such as high levels of energy efficiency, mandatory renewable energy for heating and electricity, the use of recycled and sustainable building materials, a district heating system for distributing heat, the provision of allotments for growing food, and even the banning of tumble driers, with natural drying areas being provided instead.⁴

China

China is working with investment and technology supplied by the Singapore government to build an ecocity in the Coastal New District of Tianjin City in northern China. ⁵

Dongtan Eco-city is the name of another project on the third largest island in China at the mouth of the Yangtze River near Shanghai. The project was scheduled to accomodate 50,000 residents by 2010, but its developer has currently put construction on hold.⁶

As of April 2008, an ecocity collobration project is being proposed for a district in Nanjing, the capital city of Jiangsu Province on the Yangtze River, just west of Shanghai.

Rizhao is known for its mandate of solar water heaters, and has been designated the Environmental Model City by China's SEPA.^2:108

Wales

St Davids aims to be the first carbon neutral city in the world [1]

References

Notes

Further reading

• Richard Register (2006) Ecocities: building cities in balance with nature, New Society Publishers. ISBN 0865715521.
• Timothy Beatley (2000) (1997) [http://worldcat.org/oclc/36695680&referer=one_hit Eco-city dimensions : healthy communities, healthy planet, New Society Publishers. ISBN 0865713537.
• Richard Register (1987) Ecocity Berkeley: building cities for a healthy future, North Atlantic Books. ISBN 1556430094.
• Sim Van der Ryn and Peter Calthorpe (1986) Sustainable communities : a new design synthesis for cities, suburbs, and towns, Sierra Club Books. ISBN 087156629X.
• Paolo Soleri (1973) Arcology : the city in the image of man, MIT Press. ISBN 0262190605.
• Ian L. McHarg (1969) Design with nature, Published for the American Museum of Natural History [by] the Natural History Press."

External links

• Sustainable Cities, Terrain.org
• Ecocity Builders
• Ecocity Summit 2008, April 22-26, San Francisco, California.
• Ecocity Summit 2008 media site
• Which way China?Herbert Girardet, 2006 October 2nd, chinadialogue. Discusses the emergences of ecocities in China.
• Los Angeles: A History of the Future
• Transition Towns, a organisation building sustainable cities
• Resource Guide on Sprawl and the New Urbanismedited by Deborah Sommer, Environmental Design Library, University of California, Berkeley.
• Bicycle City
• The Ecocity web forum, with a proposal for an environmentally responsible clean-slate ecocity.

See also

• Transition town